<template>
    <el-dialog :title="type == 'add' ? '添加轮播图' : '修改轮播图'" v-model="visible" width="400px">
        <el-form :model="ruleForm" :rules="rules" ref="formRef" label-width="100px" class="good-form">
            <el-form-item label="图片" prop="url">
                <el-upload class="avatar-uploader" :action="uploadImgServer" accept="jpg,jpeg,png" :headers="{
            token: token
          }" :show-file-list="false" :before-upload="handleBeforeUpload" :on-success="handleUrlSuccess">
                    <img style="width: 200px; height: 100px; border: 1px solid #e9e9e9;" v-if="ruleForm.url" :src="ruleForm.url" class="avatar">
                    <i v-else class="el-icon-plus avatar-uploader-icon"></i>
                </el-upload>
            </el-form-item>
            <el-form-item label="跳转链接" prop="link">
                <el-input type="text" v-model="ruleForm.link"></el-input>   
            </el-form-item>
            <el-form-item label="排序值" prop="sort">
                <el-input type="number" v-model="ruleForm.sort"></el-input>
            </el-form-item>
        </el-form>
        <template #footer>
            <span class="dialog-footer">
                <el-button @click="visible = false">取 消</el-button>
                <el-button type="primary" @click="submitForm">确 定</el-button>
            </span>
        </template>
    </el-dialog>
</template>
<script>
import { reactive, ref, toRefs } from "vue";
import axios from "@/utils/axios";
// uploadImgServer 公用图片上传接口，我将其统一封装在 /utils/index.js 文件中
import { localGet, uploadImgServer } from "@/utils";
import { ElMessage } from "element-plus";

export default {
    name: "DialogAddSwiper",
    props: {
        type: String, // add 为新增；edit 为编辑
        reload: Function, // table 刷新的方法
    },
    setup(props) {
        // formRef 用于表单验证控制
        const formRef = ref(null);
        const state = reactive({
            uploadImgServer,
            token: localGet("token") || "", // 用于调用上传图片接口是，放在请求头上的 token
            visible: false, // 控制弹窗的显示隐藏
            ruleForm: {
                url: "",
                link: "",
                sort: "",
            },
            rules: {
                url: [
                    {
                        required: "true",
                        message: "图片不能为空",
                        trigger: ["change"],
                    },
                ],
                sort: [
                    {
                        required: "true",
                        message: "排序不能为空",
                        trigger: ["change"],
                    },
                ],
            },
            id: "",
        });
        // 获取详情
        const getDetail = (id) => {
            axios.get(`/carousels/${id}`).then((res) => {
                state.ruleForm = {
                    url: res.carouselUrl,
                    link: res.redirectUrl,
                    sort: res.carouselRank,
                };
            });
        };
        // 上传之前，控制上传的文件。
        const handleBeforeUpload = (file) => {
            const sufix = file.name.split(".")[1] || "";
            if (!["jpg", "jpeg", "png"].includes(sufix)) {
                ElMessage.error("请上传 jpg、jpeg、png 格式的图片");
                return false;
            }
        };
        // 上传图片
        const handleUrlSuccess = (val) => {
            state.ruleForm.url = val.data || "";
        };
        // 开启弹窗，此方法将在父组件，通过 ref 直接调用。
        const open = (id) => {
            state.visible = true;
            // 如果带着 id，则是编辑，否则为新增
            if (id) {
                state.id = id;
                getDetail(id);
            } else {
                state.ruleForm = {
                    url: "",
                    link: "",
                    sort: "",
                };
            }
        };
        // 关闭弹窗
        const close = () => {
            state.visible = false;
        };
        // 提交表单方法
        const submitForm = () => {
            console.log(formRef.value.validate);
            formRef.value.validate((valid) => {
                // valid 为是否通过表单验证的变量
                if (valid) {
                    if (props.type == "add") {
                        // 增加用 axios.post
                        axios
                            .post("/carousels", {
                                carouselUrl: state.ruleForm.url,
                                redirectUrl: state.ruleForm.link,
                                carouselRank: state.ruleForm.sort,
                            })
                            .then(() => {
                                ElMessage.success("添加成功");
                                state.visible = false;
                                if (props.reload) props.reload();
                            });
                    } else {
                        // 编辑用 axios.put
                        axios
                            .put("/carousels", {
                                carouselId: state.id,
                                carouselUrl: state.ruleForm.url,
                                redirectUrl: state.ruleForm.link,
                                carouselRank: state.ruleForm.sort,
                            })
                            .then(() => {
                                ElMessage.success("修改成功");
                                state.visible = false;
                                if (props.reload) props.reload();
                            });
                    }
                }
            });
        };
        return {
            ...toRefs(state),
            open,
            close,
            formRef,
            handleBeforeUpload,
            handleUrlSuccess,
            submitForm,
        };
    },
};
</script>
<style scoped>
  .avatar-uploader {
    width: 100px;
    height: 100px;
    color: #ddd;
    font-size: 30px;
  }
  .avatar-uploader-icon {
    display: block;
    width: 100%;
    height: 100%;
    border: 1px solid #e9e9e9;
    padding: 32px 17px;
  }
</style>